| The American Temperament Test Society has available results of dogs tested by them. As of December 2003, the following results were found: |
Breed of Dog | # tested | # passed | % passed |
| American Pit Bull Terrier | 446 | 374 | 83.9% |
| American Staffordshire Terrier | 457 | 380 | 83.2% |
| Golden Retriever | 637 | 530 | 83.2% |
| Labrador Retriever | 623 | 567 | 91.0% |
| Shetland Sheepdog | 440 | 292 | 66.4% |
| Collie | 761 | 601 | 79.0% |
This can be verified with the A.T.T.S. by calling them at (314)869-6103 or on the web at www.atts.org. |
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